A 5-axis CNC is a numerical control system for machining 3D shapes. It covers 5 different axes with respect to the workpiece. The cutting tool can be moved along each of the five axes, and this combination of movements gives you the ability to produce complex shapes in one step.
A 5-axis machining center is a type of CNC machine that has a rotating table. This allows the cutting tool to move in five different directions, which enables it to fully utilize its potential and maximize productivity on the shop floor. The big advantage of having this kind of setup is that you don’t have to reorient your part or reset your tool paths as often.
The main advantage of a 5-axis CNC machine over other types of milling machines is its flexibility: The ability to swivel the workpiece in multiple directions makes it possible to create complex shapes at one time and cut down on setup times by eliminating the need for multiple setups (and their associated costs).
A 5-axis CNC can also be used for more than just milling and drilling; it’s been proven effective in everything from dying sinking applications to laser cutting operations because its versatility makes it ideal for any task that requires high precision and tight tolerances.

I am currently building a 5 axis CNC router. I’ll have the entire thing completed and documented by May of 2007.
My machine has a cutting area of 30x30x12 inches.
It is built with an all-aluminum frame, 8mm linear ball bearings, and a belt drive with ball screws on the X and Y-axis. I’m using a 1/4-10 acme rod with anti-backlash nuts for the Z-axis. In order to reduce backlash and slop in the system, I designed a custom bearing carriage that will have 2 ball bearings on each side of the ballscrew and 6 angular contact bearings in the center (3 on each side) to preload the ballscrews. The center section is made from 6061 T6 aluminum. The sides are made from 304 stainless steel since it is stronger than 6061 T6 at this size.

A 5 axis CNC machine includes all the axes of a 6 axis, with one rotational axis left out. Most people prefer a 5 axis over a 6 axis because it is more reliable and tends to be more accurate than a 6 axis. You can achieve many different types of cuts with this machine, including:
Standard 3-Axis Milling at Any Angle
The first angle is standard 3-axis milling that comes straight from the manufacturer. This means you have basic cutting capabilities, allowing you to cut from multiple angles. The second angle is more unique. It allows you to cut at any angle by tilting the head, which gives you more versatility. If you need to make complex cuts or need to be able to change angles quickly and easily, this is a good option for you.

Setting up a 5 axis machine is not that difficult, but it does require some special considerations. The biggest difference in setup from a 3-axis machine is that you need to work in more than one plane at a time. This means you will need to use a rotary axis or a trunnion table to rotate the part so you can cut it on each surface.
You also need to decide which of the 5 axes you want to use. You can set up your machine with either the X, Y, and Z axes as your primary cutting axes and the A and B axes as your secondary rotational axes or vice versa. Most people prefer to have the Z-axis as their primary cutting axis because most of the time that is where you are going to have the tooltip located. You are also going to want to set up your part program so that you always have a tool down on the material when all five axes are spinning because this will make your machining more efficient.
Before you begin machining a part, however, you need to do some setup work on your CNC machine. This includes mounting, orienting, and squaring your rotary device and setting up any fixtures, clamping devices, or vacuum tables needed for holding down your workpiece

The size of the machine is a good question. I have a small 5 axis CNC mill myself and I use it for everything from milling to drilling to turning.
I’m also a machinist, so I’ve had the opportunity to work on some pretty big machines. I can tell you that there are no limits to the size of machines you can build, but there are some practical considerations.
A large machine is going to take up a lot of space. The biggest thing is how much room you have in your shop and how much space you need for other projects.
If you don’t have a lot of room, then a smaller machine might be better. You could also build your own CNC machine if you want to save money or make it easier to move around.

The cost of CNC machining a boat plug will depend on the amount of machining time required, the size of the plug and the complexity of the shape.
The size is easy enough to determine by measuring. The shape is more difficult to assess, but can be approximated by imagining how many times you would have to move a router around the surface in order to machine it with hand tools. That will give you an idea of how much “air” time your machine will require – which has a significant impact on cost.
The complexity of the shape is also important because it will affect the length of time required to program and set up your CNC machine.

The machine can be controlled with mach3 through the XYZ +-U.
The U axis is used for the rotation of the table around the Z-axis, which is not perpendicular to the table in 5-axis machines. In some machines, this rotation movement is done by tilting the head while in others, such as box machining centers and cabinet machining centers, it should be done by the CNC software separately.
Mach3 supports up to 6 axes. So you need to set up a new axis for this purpose in a general setting and select an unused axis for that.
For example, The U axis can be selected on the A-axis port pin and enable the A axis port pin and then define a motor tuning for this axis.
MACH3 5 AXIS SETTINGS
GENERAL CONFIGURATION>>>AXIS SETTING>>> AXIS SELECTION>>>SELECT U (A) AXIS
Then go to Port & Pin section and enable U Axis Output.
PORT & PIN CONFIGURATION>>>MOTORS AND SPINDLE>>>OUTPUTS>>>ENABLE U (A) OUTPUT

Setting up the work offset table for 5 axis cnc machine is much more complicated than setting it up for 3 axis milling machines. It can be done by a professional machinist but it is not easy to do it by a novice.
On a 5 axis milling machine, the work offset table is made up of seven rows and six columns. The first row and column are left blank so that they don’t take part in any calculations, only the second row and column are used for making calculations.
The second row and column of the table will hold the initial values that you wish to set for your part program. They will also help you set up other values in the remaining rows and columns of the table.

This video shows you how to film inside a 5 axis CNC machine.
1. Use an on-axis LED light that is a right angle
2. Use a lens that has optical image stabilization
3. If possible, use a camera that has digital image stabilization
4. Hand hold the camera (may be difficult if you are not used to it)
5. Use a high shutter speed if you hand hold the camera to eliminate camera shake (1/250 or higher)

There are 5 axis CNC machines that have 5 axes. They are
X: Left-Right direction
Y: Front-Back direction (parallel to the table surface)
Z: Up-Down direction (perpendicular to the table surface)
W: Swivel spindle head about the X-axis.
P: Pivot of the swivel spindle head about the Z-axis.

First, you could get some more instructions from this video.
Since I am not sure if there is a professional inversion of the CNC machine, we can just focus on how to finish the inversion by ourselves.
Generally, here are the details:
Step 1: Find a large platform or table to hold the CNC machine. Then put it upside down on the platform.
Step 2: Cut off all the wires or cables that connect with the CNC machine.
Step 3: Install a new set of wires or cables on the CNC machine.
Step 4: Install a new set of wires or cables on your computer and prepare for connection between computer and CNC machine.
Step 5: Test if there is any short-circuit after the installation of wires or cables.

The time it takes to learn CNC machining depends on the type of machining to be done. For example, programming a milling machine with Fanuc controls or Haas controls can take less than half the time needed for other controls. The Fanuc and Haas control are similar in many ways and easy to learn.
The basic concepts are the same whether you are running a lathe or a milling machine. However, there is more information to keep straight when programming a multi-axis lathe as opposed to a 3 axis milling machine.
Programming also depends on how much training is given by the employer. A high school graduate with no experience working in a shop but was trained well by his employer might take 3 months to become fully proficient. On the other hand, an experienced machinist might take 6 months to learn to program if he did not have much previous experience with CNC machines and was not given thorough training by his employer.